<template>
  <div>
      <ul>
          <li v-for="(itme,index) in arr " :key="index">
             {{itme}} <button @click="del(index)">删除</button>
          </li>
      </ul>
      <button @click="add">生成</button>
  </div>
</template>

<script>
export default {
    data () {
        return {
             arr:[1,3,5]
        }
    },
    methods: {
        add(){
           this.arr.push(Math.floor((Math.random()*20))) 
        },
        del(index){
            this.arr.splice(index,1)
        }
    }
}
</script>

<style>

</style>